How can one deal with an insincere fiancée – despite available opportunities to rectify that – while maintaining a good and close relationship with her family?

If the lies pertain to a girl’s past slip or sin, then it is not permissible to question her about them, and she is obligated to conceal them. However, if the lying is incidental and not an ingrained characteristic, then there is no harm in marrying her, while advising her after marriage. But if the girl is addicted to lying, then lying is a characteristic of hypocrites and leads to immorality and cursing, and it is a grave flaw in religion and character. Therefore, it is advisable to confront her with the concern and request her repentance, and to delay the marriage contract to ensure her repentance. Otherwise, it is recommended to leave her, bearing in mind that the fiancée is a stranger to her fiancé.